gz_ktru_OKEIs
id integer NOT NULL PRIMARY KEY
id
ktru_id varchar(36) NOT NULL FOREIGN KEY REFERENCES gz_ktru(code)
ktru_id
gz_ktru
code
okei_id varchar(8) NOT NULL FOREIGN KEY REFERENCES gz_okei(code)
okei_id
gz_okei
UNIQUE KEY (ktru_id, okei_id)